357 citations · 3.8k across the 106 of their papers we have counts for
7 papers · 1 filter
Dissipation-induced quantum phase transition in a quantum box
L. Borda, G. Zarand, P. Simon
In a recent work, Le Hur has shown that dissipative coupling to gate electrodes may play an important role in a quantum box near its degeneracy point [K. Le Hur, Phys. Rev. Lett. {…
Scaling theory of magneto-resistance in disordered local moment ferromagnets
Gergely Zarand, Catalin Pascu Moca, Boldizsar Janko
We present a scaling theory of magneto-transport in Anderson-localized disordered ferromagnets. Within our framework a pronounced magnetic-field-sensitive resistance peak emerges n…
Existence of two-channel Kondo regime for tunneling impurities with resonant scattering
Gergely Zarand
Dynamical tunneling systems have been proposed earlier to display a two-channel Kondo effect, the orbital index of the particle playing the role of a pseudospin in the equivalent K…
Exotic Kondo effect from magnetic trimers
Bence Lazarovits, Pascal Simon, Gergely Zarand +1
Motivated by the recent experiments of Jamneala {\em et al.} [T. Jamnaela {\em et al.}, Phys. Rev. Lett. {\bf 87}, 256804 (2001)], by combining {\em ab-initio} and renormalization…
Positional Disorder, Spin-Orbit Coupling and Frustration in GaMnAs
Gregory A. Fiete, Gergely Zarand, Boldizsar Janko +2
We study the magnetic properties of metallic GaMnAs. We calculate the effective RKKY interaction between Mn spins using several realistic models for the valence band structure of G…
Regular and Singular Fermi Liquid fixed points in quantum impurity models
Pankaj Mehta, L. Borda, Gergely Zarand +2
We show that thermodynamics is insufficient to probe the nature of the low energy dynamics of quantum impurity models and a more subtle analysis based on scattering theory is requi…